Explosion-proof valve and case

Abstract

An explosion-proof valve and a case, relating to the technical field of explosion-proof valves. The explosion-proof valve is provided on the case, and comprises a valve body, a retaining cap, and a breathing mechanism. A breathing channel is provided on the valve body. The retaining cap is slidably connected to the valve body, and a gap is formed between the retaining cap and the valve body. The breathing mechanism is movably connected to the retaining cap, and a breathing switch is formed between the breathing mechanism and the valve body. When the breathing mechanism abuts against the valve body, the breathing switch is turned on, and the interior of the case is communicated with the outside. When the breathing mechanism is separated from the valve body, the breathing switch is turned off, and the interior of the case is not communicated with the outside.

Description

An explosion-proof valve and housing

[0001] This application claims priority to Chinese Patent Application No. 202411219045.8, filed with the Chinese Patent Office on August 30, 2024, and Chinese Patent Application No. 202422141591.6, filed with the Chinese Patent Office on August 30, 2024. The entire contents of the above applications are incorporated herein by reference. Technical Field

[0002] This application relates to the field of explosion-proof valve technology, specifically to an explosion-proof valve and its housing. Background Technology

[0003] With the development of electric vehicles, the use of batteries or battery modules is increasing. To ensure the safety of batteries or battery modules, they are usually placed inside the battery box.

[0004] During use, the battery casing may be exposed to low-pressure environments, which can cause it to deform. To prevent this deformation, an explosion-proof valve is typically installed on the battery casing. In related technologies, this valve is equipped with an automatic switch to regulate the pressure difference between the inside and outside of the casing. Invention Overview

[0005] In environments with high humidity, the automatic switch on the explosion-proof valve may cause a large amount of water vapor to enter the battery box when adjusting the pressure difference between the inside and outside of the box, affecting the batteries or battery modules inside the battery box.

[0006] This application provides an explosion-proof valve, which is mounted on a housing and includes a valve body, a pressure cap, and a breathing mechanism. The valve body has a breathing channel. The pressure cap is slidably connected to the valve body, with a gap between them. The breathing mechanism is movably connected to the pressure cap, forming a breathing switch with the valve body. When the breathing mechanism is in contact with the valve body, the breathing switch is open, connecting the housing to the outside. When the breathing mechanism is separated from the valve body, the breathing switch is closed, and the housing is not connected to the outside. Beneficial effects

[0007] In this application, by setting a breathing mechanism, the connection between the breathing mechanism and the valve body can be manually adjusted, so as to select whether to open the breathing switch according to the external environment, and prevent water vapor from entering the box through the explosion-proof valve when the humidity is high. Attached Figure Description

[0008] Figure 1 is a schematic diagram of the top structure of an explosion-proof valve provided in an embodiment of this application;

[0009] Figure 2 is a schematic diagram of the bottom structure of an explosion-proof valve provided in an embodiment of this application;

[0010] Figure 3 is an exploded view of an explosion-proof valve provided in an embodiment of this application;

[0011] Figure 4 is a cross-sectional view of an explosion-proof valve provided in this application.

[0012] In the picture:

[0013] 110-Valve body; 120-Pressure cap; 130-Breathing mechanism; 140-Breathing switch; 150-Breathing channel; 160-Protective sleeve; 170-Guide shaft; 180-Second spring; 190-Filter membrane; 191-Pressure block;

[0014] 111-Body; 112-Fixed bracket;

[0015] 121 - First through hole; 122 - Second through hole;

[0016] 131-Switch element; 132-First spring;

[0017] 151 - First breathing channel; 152 - Second breathing channel; 153 - Third breathing channel;

[0018] 161 - Guide post; 171 - Support body;

[0019] 1111-Boss; 1112-Ventilation hole; 1311-Breathing disc; 1312-Connecting rod; 1313-Opening cover;

[0020] 13131 - Protrusion;

[0021] 1121 - First annular groove; 1122 - First sealing gasket; 1113 - Second annular groove; 1114 - Second sealing gasket; 1115 - Third annular groove; 1116 - Third sealing gasket. Embodiments of the present invention

[0022] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0023] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0024] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0025] It should be understood that the terminology used in the description of the various examples herein is for the purpose of describing the particular examples only and is not intended to be limiting. As used in the description of the various examples, the singular forms “a” (“a”, “an”) and “the” are intended to include the plural forms as well, unless the context explicitly indicates otherwise.

[0026] In this application, "at least one" means one, two, or more, and "more than" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be a single item or multiple items.

[0027] It should also be understood that, in this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a sliding connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0028] It should also be understood that the term “comprising” (also referred to as “includes”, “including”, “comprises” and / or “comprising”) as used in this specification specifies the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0029] It should be understood that the terms "an embodiment," "another embodiment," and "a possible design" used throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment or implementation is included in at least one embodiment of this application. Therefore, phrases such as "in one embodiment of this application," "in another embodiment of this application," and "a possible design" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0030] It should also be understood that the specific values ​​mentioned in the embodiments of this application are not intended to limit the specific dimensions of particular features or structures. The relevant values ​​may be illustrative examples for ease of understanding, or they may represent the theoretically optimal value for a certain feature. In practice, the relevant dimensions may be a range around the value, for example, the range may be ±10% of the optimal theoretical value, or ±20% of the optimal theoretical value, depending on whether the corresponding technical effect can be achieved.

[0031] The term "perpendicular" in this application's embodiments includes similar cases, such as angles between lines, lines and surfaces, or surfaces ranging from 80° to 100°, which can also be understood as perpendicular, rather than strictly limiting the angle between them to 90°. Similarly, the term "parallel" in this application's embodiments also includes similar cases, namely angles between lines, lines and surfaces, or surfaces ranging from 0° to 10°, which can also be understood as parallel.

[0032] With the development of electric vehicles, the application scenarios for batteries or battery modules are becoming more and more diverse. In order to ensure the safety of the use of batteries or battery modules, they are generally placed inside a box.

[0033] During use, the battery enclosure may be in a low-pressure environment, which can cause it to deform. To prevent this deformation, an explosion-proof valve is typically installed on the enclosure. In related technologies, this valve has an automatic switch to regulate the pressure difference between the inside and outside of the enclosure. However, in environments with high humidity, this can cause a large amount of water vapor to enter the enclosure, forming condensation and potentially affecting the batteries or battery modules inside.

[0034] This application provides an explosion-proof valve. Referring to Figures 1, 2, and 3, Figure 1 is a schematic diagram of the top structure of the explosion-proof valve provided in this application embodiment, Figure 2 is a schematic diagram of the bottom structure of the explosion-proof valve provided in this application embodiment, and Figure 3 is an exploded view of the explosion-proof valve provided in this application embodiment.

[0035] The explosion-proof valve provided in this application embodiment is installed on the enclosure. For example, the explosion-proof valve can be installed on the cover plate of the enclosure or on the side of the enclosure. This application embodiment does not limit the specific location of the explosion-proof valve on the enclosure.

[0036] As shown in Figures 1 to 3, the explosion-proof valve provided in this embodiment includes a valve body 110, a gland 120, and a breathing mechanism 130.

[0037] A breathing channel 150 is provided on the valve body 110. One end of the breathing channel 150 communicates with the interior of the housing, and the other end of the breathing channel 150 communicates with the breathing mechanism 130. A pressure cap 120 is connected to the valve body 110 and has a gap between the pressure cap 120 and the valve body 110. The breathing mechanism 130 is movably connected to the pressure cap 120 and forms a breathing switch 140 between the mechanism and the valve body 110.

[0038] Specifically, when the breathing mechanism 130 abuts against the valve body 110, the breathing switch 140 is closed, and the inside of the housing is not connected to the outside. When the breathing mechanism 130 separates from the valve body 110, the breathing switch 140 is opened, and the inside of the housing is connected to the outside. Specifically, the inside of the housing is connected to the outside through the breathing channel 150, the breathing switch 140, and the gap between the pressure cap 120 and the valve body 110.

[0039] In this embodiment, by setting a breathing mechanism 130, the connection between the breathing mechanism 130 and the valve body 110 can be manually adjusted, so as to select whether to turn on the breathing switch 140 according to the external environment, and prevent water vapor from entering the box through the explosion-proof valve when the humidity is high.

[0040] In one embodiment of this application, in order to achieve a better sealing effect, a first sealing gasket 1122 is also provided between the breathing mechanism 130 and the valve body 110. Referring to FIG4, FIG4 is a cross-sectional view of an explosion-proof valve provided in this application, wherein FIG4 is a cross-sectional view obtained by sectionalizing FIG1 along the AA direction.

[0041] As shown in Figure 4, a first sealing gasket 1122 is also provided between the breathing mechanism 130 and the valve body 110. When the breathing mechanism 130 abuts against the valve body 110, the breathing mechanism 130 is connected to the valve body 110 through the first sealing gasket 1122. That is, when the breathing switch 140 is closed, the first sealing gasket 1122 can achieve a good sealing effect, preventing external water vapor from entering the box through the breathing switch 140 formed between the breathing mechanism 130 and the valve body 110.

[0042] Specifically, to better install the first sealing gasket 1122, as shown in Figure 4, a first annular groove 1121 is provided on the valve body 110, and the first sealing gasket 1122 is disposed within the first annular groove 1121. It should be noted that the thickness of the first sealing gasket 1122 is greater than the depth of the first annular groove 1121, that is, a portion of the first sealing gasket 1122 is outside the first annular groove 1121, and this portion of the first sealing gasket 1122 is used to contact the breathing mechanism 130.

[0043] Since the first sealing gasket 1122 is disposed within the first annular groove 1121, in this embodiment of the application, the first sealing gasket 1122 can be an annular sealing ring.

[0044] As shown in Figure 4, the first sealing groove is set on the fixed bracket 112 of the valve body 110. The specific structure of the valve body 110 will be described in detail in subsequent embodiments.

[0045] In one embodiment of this application, as shown in Figures 3 and 4, the breathing mechanism 130 includes a switch 131 and a first spring 132. The switch 131 is slidably connected to the pressure cover 120. One end of the first spring 132 abuts against the pressure cover 120, and the other end of the first spring 132 abuts against the switch 131. The first spring 132 is in a first compressed state.

[0046] When the breathing switch 140 is closed, the first spring 132 is in a first compressed state. Because the first spring 132 is in a compressed state, it exerts a thrust on the switch element 131, causing the switch element 131 to abut against the first sealing gasket 1122 on the valve body 110. This achieves a seal between the switch element 131 and the valve body 110.

[0047] When it is necessary to open the explosion-proof valve to allow ventilation between the inside of the enclosure and the outside, the switch 131 can be pulled outward. At this time, the breathing switch 140 is in the open state. When the switch 131 is pulled, it will further compress the first spring 132, compressing the first spring 132 from the first compression state to the second compression state. At this time, the switch 131 separates from the valve body 110. The inside of the enclosure can communicate with the outside through the breathing channel 150, the breathing switch 140, and the gap between the pressure cap 120 and the valve body 110, thereby achieving air pressure balance between the inside and outside of the enclosure.

[0048] In one embodiment of this application, as shown in Figures 3 and 4, the switch 131 includes a breathing disc 1311, a connecting rod 1312, and a switch cover 1313. The breathing disc 1311 is fixedly connected to one end of the connecting rod 1312, and the switch cover 1313 is fixedly connected to the other end of the connecting rod 1312. The breathing disc 1311 can be integrally formed with the connecting rod 1312, and the switch cover 1313 can be fixedly connected to the connecting rod 1312 by screws.

[0049] The connecting rod 1312 is slidably connected to the pressure cap 120, thereby achieving a sliding connection between the switch element 131 and the pressure cap 120. The breathing disc 1311 is located on the side of the pressure cap 120 closer to the valve body 110, and the switch cover 1313 is located on the side of the pressure cap 120 away from the valve body 110. One end of the first spring 132 abuts against the pressure cap 120, and the other end of the first spring 132 abuts against the breathing disc 1311.

[0050] When the breathing switch 140 is closed, the breathing disc 1311 on the switch 131 abuts against the valve body 110 and contacts the first sealing gasket 1122 on the valve body 110. When the breathing switch 140 is open, the breathing disc 1311 on the switch 131 separates from the valve body 110, that is, a channel is created between the breathing disc 1311 and the valve body 110, allowing gas to enter the interior of the chamber through this channel.

[0051] The switch cover 1313 is provided to facilitate pulling the switch 131. In this embodiment, the specific shape of the switch cover 1313 is not limited. For example, the switch cover 1313 can be rectangular, square, or circular, or it can be set as a handle.

[0052] In one embodiment of this application, the pressure cap 120 is provided with a first through hole 121 and a second through hole 122, and the switch cover 1313 is provided with a protrusion 13131, the size of which is adapted to the size of the second through hole 122. The connecting rod 1312 is slidably connected within the first through hole 121, that is, the connecting rod 1312 is slidably connected to the pressure cap 120 through the first through hole 121.

[0053] When the breathing switch 140 is closed, the protrusion 13131 is located within the second through hole 122, and the breathing disc 1311 abuts against the valve body 110. When the breathing switch 140 is open, the switch cover 1313 can be pulled outward to pull the protrusion 13131 out of the second through hole 122. When it is necessary to keep the breathing switch 140 in the open state, the switch cover 1313 can be rotated to make the protrusion 13131 abut against the surface of the pressure cap 120 away from the valve body 110. At this time, the distance between the breathing disc 1311 and the valve body 110 is consistent with the height of the protrusion 13131 itself, thereby enabling the breathing switch 140 to be opened and kept in the open state.

[0054] At this time, since the second through hole 122 is not blocked by the protrusion 13131, the inside of the box can also be connected to the outside through the breathing channel 150, the breathing switch 140 and the second through hole 122.

[0055] When it is necessary to turn off the breathing switch 140 again, the switch cover 1313 can be rotated so that the protrusion 13131 is in the second through hole 122. At this time, the breathing disc 1311 abuts against the valve body 110, and the breathing switch 140 is closed.

[0056] It should be noted that multiple second through holes 122 can be provided on the pressure cover 120, and a corresponding number of protrusions 13131 can be provided on the switch cover 1313. The position of the protrusions 13131 on the switch cover 1313 corresponds to the position of the second through holes 122 on the pressure cover 120.

[0057] In one embodiment of this application, since the battery or battery module inside the box may explode, causing the pressure inside the box to rise instantly, the explosion-proof valve also needs to have a certain explosion-proof function.

[0058] As shown in Figures 2, 3, and 4, the valve body 110 includes a body 111 and a fixed bracket 112. The body 111 is provided with a boss 1111 and a vent hole 1112. The fixed bracket 112 is slidably connected to the body 111 and abuts against the boss 1111 through a second sealing gasket 1114. The breathing disc 1311 in the switching component 131 abuts against the fixed bracket 112 through a first sealing gasket 1122. The fixed bracket 112 is provided with a first breathing channel 151.

[0059] When the pressure inside the chamber increases instantaneously, the gas inside the chamber can push open the fixed bracket 112 through the vent 1112, allowing the gas inside the chamber to be discharged to the outside through the gap between the fixed bracket 112 and the body 111, as well as the gap between the pressure cap 120 and the body 111 of the valve body 110, thereby achieving a balance of the internal and external pressure difference of the chamber.

[0060] In one embodiment of this application, the explosion-proof valve further includes a filter membrane 190 and a pressure block 191. The filter membrane 190 is pressed onto the fixed bracket 112 by the pressure block 191, and the filter membrane 190 is located at one end of the first breathing channel 151. When the breathing switch 140 is activated, the filter membrane 190 can filter water vapor, preventing external water vapor from entering the enclosure.

[0061] In one embodiment of this application, the explosion-proof valve further includes a protective sleeve 160, a guide shaft 170, and a second spring 180. A second breathing channel 152 is provided on the guide shaft 170, and a third breathing channel 153 is provided on the protective sleeve 160. The first breathing channel 151, the second breathing channel 152, and the first breathing channel 151 together form the breathing channel 150 in this embodiment of the application.

[0062] The protective sleeve 160 is fixedly connected to the body 111, the guide shaft 170 is slidably connected to the body 111 and located inside the protective sleeve 160, and the fixed bracket 112 is fixedly connected to the guide shaft 170. One end of the second spring 180 abuts against the body 111, and the other end of the second spring 180 is connected to the end of the guide shaft 170 away from the body 111.

[0063] When the pressure inside the chamber increases instantaneously, the gas inside the chamber can push open the fixed bracket 112 through the vent 1112. Since the fixed bracket 112 is fixedly connected to the guide shaft 170, it will drive the guide shaft 170 to move, compressing the second spring 180. After the gas inside the chamber is discharged to the outside through the gap between the fixed bracket 112 and the body 111, and the gap between the pressure cap 120 and the body 111 of the valve body 110, the gas pressure inside the chamber decreases, the second spring 180 returns to its original deformation, and pulls the fixed bracket 112 back to its initial position through the guide shaft 170.

[0064] In one embodiment of this application, to better connect the guide shaft 170 to the protective sleeve 160, a guide post 161 is provided inside the protective sleeve 160, and a third breathing channel 153 is disposed within the guide post 161. The guide post 161 is slidably connected to the second breathing channel 152. The guide post 161 can limit the position of the guide shaft 170 within the protective sleeve 160 without affecting the sliding of the guide shaft 170 within the protective sleeve 160. Furthermore, by providing the third breathing channel 153 on the guide post 161, communication between the third breathing channel 153 and the second breathing channel 152 can be achieved, ensuring that the interior of the housing can communicate with the outside world through the breathing channel 150.

[0065] In one embodiment of this application, in order to better achieve the connection between the second spring 180 and the guide shaft 170, a support body 171 is provided at the end of the guide shaft 170 away from the body 111, one end of the second spring 180 abuts against the body 111, and the other end of the second spring 180 abuts against the support body 171.

[0066] In one embodiment of this application, to facilitate better installation of the second sealing gasket 1114, a second annular groove 1113 is provided on the boss 1111, and the second sealing gasket 1114 is disposed within the second annular groove 1113. It should be noted that the thickness of the second sealing gasket 1114 is greater than the depth of the second annular groove 1113; that is, a portion of the second sealing gasket 1114 is outside the second annular groove 1113, and this portion of the second sealing gasket 1114 is used to contact the fixing bracket 112. Since the second sealing gasket 1114 is disposed within the second annular groove 1113, in this embodiment of the application, the second sealing gasket 1114 can be an annular sealing ring.

[0067] In one embodiment of this application, to better achieve a seal between the explosion-proof valve and the housing, a third annular groove 1115 is provided on the side of the valve body 110 away from the gland 120, and a third sealing gasket 1116 is provided within the third annular groove 1115. The valve body 111 can be connected to the housing through the third sealing gasket 1116, achieving good sealing between them.

[0068] In this application embodiment, a box is also provided, which includes a box body and an explosion-proof valve as described in any of the foregoing embodiments, wherein the explosion-proof valve is disposed on the box body.

[0069] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0070] This document uses specific examples to illustrate the working principle and implementation method of the explosion-proof valve and housing of this application. The description of the above embodiments is only for the purpose of helping to understand the specific settings and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation method and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An explosion-proof valve, wherein the explosion-proof valve is disposed on a housing, characterized in that, include: The valve body is equipped with a breathing channel; A gland is attached to the valve body and has a gap with the valve body; A breathing mechanism is movably connected to the pressure cap and forms a breathing switch with the valve body; When the breathing mechanism abuts against the valve body, the breathing switch is closed, and the inside of the box is not connected to the outside. When the breathing mechanism is separated from the valve body, the breathing switch is turned on, and the inside of the housing is connected to the outside.

2. The explosion-proof valve according to claim 1, characterized in that, A first sealing gasket is also provided between the breathing mechanism and the valve body. When the breathing mechanism abuts against the valve body, the breathing mechanism is connected to the valve body through the first sealing gasket.

3. The explosion-proof valve according to claim 2, characterized in that, The valve body is provided with a first annular groove, and the first sealing gasket is disposed in the first annular groove.

4. The explosion-proof valve according to any one of claims 1 to 3, characterized in that, The breathing mechanism includes a switch and a first spring. The switch is slidably connected to the pressure cap. One end of the first spring abuts against the pressure cap, and the other end of the first spring abuts against the switch. When the breathing switch is closed, the first spring is in a first compressed state, and the switch element abuts against the valve body. When the breathing switch is turned on, the first spring is compressed from the first compression state to the second compression state, and the switch element separates from the valve body.

5. The explosion-proof valve according to claim 4, characterized in that, The switching device includes a breathing disc, a connecting rod, and a switch cover. The breathing disc is fixedly connected to one end of the connecting rod, and the switch cover is fixedly connected to the other end of the connecting rod. The connecting rod is slidably connected to the pressure cap, the breathing disc is located on the side of the pressure cap closer to the valve body, and the switch cover is located on the side of the pressure cap away from the valve body; One end of the first spring abuts against the pressure cap, and the other end of the first spring abuts against the breathing disc.

6. The explosion-proof valve according to claim 5, characterized in that, The pressure cap is provided with a first through hole and a second through hole; The switch cover is provided with protrusions; The connecting rod is slidably connected in the first through hole, and the size of the protrusion is adapted to the size of the second through hole; When the breathing switch is closed, the protrusion is located inside the second through hole; When the breathing switch is turned on, the protrusion is located on the surface of the pressure cap on the side away from the valve body.

7. The explosion-proof valve according to claim 6, characterized in that, The valve body includes a main body and a fixed bracket. The main body is provided with a boss and a vent hole. The fixed bracket is slidably connected to the main body and abuts against the boss through a second sealing gasket. The breathing disc abuts against the fixed bracket via the first sealing gasket, and the fixed bracket is provided with a first breathing channel.

8. The explosion-proof valve according to claim 7, characterized in that, It also includes a protective sleeve, a guide shaft, and a second spring. The guide shaft is provided with a second breathing channel, and the protective sleeve is provided with a third breathing channel. The breathing channel includes a first breathing channel, a second breathing channel, and a third breathing channel. The protective sleeve is fixedly connected to the main body; The guide shaft is slidably connected to the body and located inside the protective sleeve; the fixed bracket is fixedly connected to the guide shaft. One end of the second spring abuts against the body, and the other end of the second spring is connected to the end of the guide shaft away from the body.

9. The explosion-proof valve according to claim 8, characterized in that, The protective sleeve is provided with a guide post, and the third breathing channel is located inside the guide post; The guide post is slidably connected to the second breathing channel.

10. The explosion-proof valve according to claim 9, characterized in that, A support is provided at one end of the guide shaft away from the main body, one end of the second spring abuts against the main body, and the other end of the second spring abuts against the support.

11. The explosion-proof valve according to claim 7, characterized in that, It also includes a filter membrane and a pressure block, wherein the filter membrane is pressed onto the fixed bracket by the pressure block, and the filter membrane is located at one end of the first breathing channel.

12. The explosion-proof valve according to claim 7, characterized in that, The boss is provided with a second annular groove, and the second sealing gasket is disposed in the second annular groove.

13. The explosion-proof valve according to claim 12, characterized in that, A third annular groove is provided on the side of the body away from the pressure cap, and a third sealing gasket is provided in the third annular groove.

14. A box, characterized in that, It includes a housing body and an explosion-proof valve as described in any one of claims 1 to 13, wherein the explosion-proof valve is disposed on the housing body.

Images